|desc=Sets max rx/tx bandwidth in kbps that will be handled by an interface. TX limit is supported on all Atheros [http://wiki.mikrotik.com/wiki/Manual:Switch_Chip_Features swith-chip] ports. RX limit is supported only on AR8327 switch-chip ports.

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|desc=Sets max rx/tx bandwidth in kbps that will be handled by an interface. TX limit is supported on all Atheros [[M:Switch_Chip_Features | switch-chip]] ports. RX limit is supported only on AR8327 switch-chip ports.

reply-only - the interface will only reply to requests originated from matching IP address/MAC address combinations which are entered as static entries in the ARP table. No dynamic entries will be automatically stored in the ARP table. Therefore for communications to be successful, a valid static entry must already exist.

auto-negotiation (yes | no; Default: yes)

When enabled, the interface "advertises" its maximum capabilities to achieve the best connection possible.

Note1: Auto-negotiation should not be disabled on one end only, otherwise Ethernet Interfaces may not work properly.

Note2: Gigabit link cannot work with auto-negotiation disabled.

bandwidth (integer/integer; Default: unlimited/unlimited)

Sets max rx/tx bandwidth in kbps that will be handled by an interface. TX limit is supported on all Atheros switch-chip ports. RX limit is supported only on AR8327 switch-chip ports.

Disable running check. If this value is set to 'no', the router automatically detects whether the NIC is connected with a device in the network or not. Default value is 'yes' because older NICs do not support it. (only applicable to x86)

tx-flow-control (yes | no | auto; Default: )

When set to on, port will send pause frames when specific buffer usage thresholds is met. auto is the same as on except when auto-negotiation=yes flow control status is resolved by taking into account what other end advertises. Feature is supported on AR724x, AR9xxx, QCA9xxx CPU ports, all CCR ports and all Atheros switch chip ports.

rx-flow-control (yes | no | auto; Default: )

When set to on, port will process received pause frames and suspend transmission if required. auto is the same as on except when auto-negotiation=yes flow control status is resolved by taking into account what other end advertises. Feature is supported on AR724x, AR9xxx, QCA9xxx CPU ports, all CCR ports and all Atheros switch chip ports.

full-duplex (yes | no; Default: yes)

Defines whether the transmission of data appears in two directions simultaneously

Detect Cable Problems

In RouterOS v6rc4 and newer releases there is the ability to detect problems with connected cables.
Cable test can detect problems or measure the approximate cable length if the cable is unplugged on the other end and there is therefore, "no-link".
RouterOS will tell:

which cable pair is damaged

the distance to the problem

how exactly the cable is broken - short-circuited or open-circuited

This also works if the other end is simply unplugged - in that case, the total cable length will be shown.

This works on SXT-G, SXT Lite, RB711G, RB2011, RB750 series and other devices with the same switch chips, and also the Cloud Core series devices.

In the above example, cable is not shorted but “open” at 4 meters distance, all cable pairs equally faulty at the same distance from the switch chip.

Stats

RouterOS v3.22 introduces a new command:

/interface ethernet print stats

This command will display all kinds of other statistics if the interface is supporting them (currently only RB450G ether2-ether5, RB750 ether2-ether5, RB750G ether1-ether5 and also RB1100 ether1-ether10). Complete list of properties can be found in section above